Physics MCQS with Answers
With the increase of temperature viscosity
Remains same
Decrease
Increase
Doubles
In Young’s experiment, two coherent sources are placed 0.90 mm apart and the fringes are observed one metre away. If its produces the second dark fringe at a distance of 1 mm from the central fringe, the wavelength of monochromatic light used would be
10 x 10-5cm
60 x 10-4cm
6 x 10-5cm
10 x 10-4cm
The percentage errors in the measurements of mass and speed are 2% and 3% respectively. How much will be the maximum error in the estimate of the kinetic energy obtained by measuring mass and speed
5%
1%
11%
8%
What will be the duration of the day and night (in hour) if the diameter of the earth is suddenly reduced to half its original value, the mass remaining constant?
2
12
3
6
Which one of the following is a simple harmonic motion?
Wave moving through a string fixed at both ends
Particle moving in a circle with uniform speed
Earth spinning about its own axis
Ball bouncing between two rigid vertical walls
The magnetic moment of a circular coil carrying current is
Inversely proportional to the square of the length of the wire in the coil
Directly proportional to the length of the wire in the coil
Inversely proportional to the length of the wire in the coil
Directly proportional to the square of the length of the wire in the coil
The peak voltage in 220 volt A.C. supply is nearly
311 volt
440 volt
253 volt
220 volt
An object is placed at a distance of f/2 from a convex lens. The image will be
At, 3f/2, real and inverted
At f, real and inverted
At 2f, virtual and erect
At one of the foci, virtual and double its size
Blood has a density
None of these
Equal to water
Greater then water
Lesser then water
Band spectrum is produced by
Na
H
H2
He
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